Comment 3 for bug 1053633

yeah, that's fair. Seems like a corner case that really only an admin could do, but would be nice to handle it better.

It seems like we could modify _check_for_dup_router_subnet() to no longer filter on device_owner, just on device_id. Then also call that method when adding gateway ports as well.

To me this doesn't seem to reach the threshold of an release blocker though.